During and after surgery, once ureteral injury is found, timely measures should be taken to mitigate and prevent the expansion of damage. 1, treatment principles: first understand the kidney function, the damaged side of the kidney function is extremely impaired and leakage of urine for autologous kidney transplantation; such as kidney function has been completely lost and no symptoms can be conservative observation, do not need to deal with. If the kidney function is still good, operate as soon as possible to relieve the symptoms of leakage, the delay of time, can make the kidney function deteriorate. 2, treatment: if the damage is small, cystoscopic ureteral cannula smoothly, can be placed in the double “J” tube, 2-3 months later removed, more can be self-healing. If the injury is large, end-to-end ureteral anastomosis is feasible. If the length of ureteral injury is large and end-to-end anastomosis cannot be performed, ureteral bladder placement is feasible; if the ureteral defect is large and bladder placement cannot be performed, then autologous kidney pelvic transplantation can be considered. Prevention of ureteral injury 1. Know the injury-prone sites: ureter across the iliac vessels, ureter at the intersection with the uterine artery, ureter into the tunnel and the bladder. 2, intraoperative bleeding treatment: to stop bleeding with caution, first gauze with pressure to stop bleeding, then suction with suction while withdrawing the gauze, see the bleeding point, then stop bleeding with hemostatic forceps, do not blindly clamp to stop bleeding. 3, pelvic adhesions inflammation, the first should restore the anatomical position of the uterus and both sides of the annexes, and then surgery. 4.For fibroids in the cervix, isthmus or broad ligament, the fibroids should be removed first and then total hysterectomy should be performed. 5.After the difficult gynecological surgery, check whether the upper ureter on both sides is thickened and peristaltic.